Edger for plywood sheets



1941- J. L. BUCKLEY EDGER FOR PLYWOOD SHEETS Filed Dec. 12, 1938 3 Sheets-Sheet 1 INVENTOR John L Buckley 1941- J. BUCKLEY EDGER FOR PLYWOOD SHEETS Filed Dec 12, 1938 3 Sheets-Sheet 2 John L INVENTOR Buckley ATT NEY Nov. 4, 1941. J. L. BUCKLEY 2,261,614

EDGER FOR PLYWOOD SHEETS Filed Dec. 12, 1938 3 Sheets-Sheet 3 W mm Patented Nov. 4, 1941 UNITED STATE E'DGER FOR PLYwooD SHEETS;

John L. Buckley,v Olympia, Wash.

Application December 1938, Serial No. 245,334.

1 Claim. (Cl. 51 -135) I My-inve'ntion relates to an edger for plywood sheets. The invention is comprised of a table having a backing plate disposed at the rear of the table and the backing plate is in spaced relation with the rear edge of the table. The backing plate is secured to an arm that is supported by the table.

An endless sand-belt is power driven and it runs longitudinally of the table and the cutting side of the sand-belt runs between the backing plate and the edge of the table. The sand-belt running at an inclination to the horizontal, so that when the sand-belt contacts the edge of the panel of plywood a substantial area of the belt will contact the edge of the sheet in its travel to uniformly wear the sand-belt and prevent the burning of the belt that would occur were the belt run horizontal relative to the top of the table upon which the sheet is placed that is to be processed.

A dust collecting hood is placed above the belt and a suction is created therein to remove dust particles coming from the belt. Heretofore, plywood sheets have been dressed at the edge with saws. This left a roughened edge and one that would not match with the adjacent edges of plywood sheets where the adjacent sheets are being used for wall surface covering. By the dressing of the sheet with a sand-belt a smoother edge results and the same can be made straight and true, so that the meeting edges of adjacent sheets when placed upon the wall or ceiling, be matched. The wall thus covered will be free of noticeable seams.

A further object of my invention is to provide an edger for plywood sheets that will be rapid in its operation; one that is simple in construction and one that may be used by millhands without special training or special talent.

A still further object of my invention is to construct the edger so that it may be placed in conjunction with my surfacing machine, patent application for which is filed concurrently herewith, so that the material Will flow continuously through the mill where the same are installed.

With these and other incidental objects in view, the invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claim, and a preferred form of embodiment of which is hereinafter shown with reference to the drawings which accompany and form a part of this specification.

In the drawings:

Fig. I is a fragmentary partial sectional plan view of the assembled devices.

.:-Fig. II isa fragmentary rear side view of the.

assembled devices.

Fig. III is an end view of the assembled device.

Fig. IV is a fragmentary sectional end view of the assembled machine.

Like reference characters refer to like parts throughout the several views.

I form my device of a leg supported table l. A backing plate 2 runs longitudinally of the rear edge of the table. The backing plate is secured to and supported by a bracket 4. The bracket 4 has an inverted bend 5 disposed therein to bring the lower edge of the backing plate substantially below the top surface 6 of the table top. A pair of shafts 6 and l are disposed at each of the ends of the table and the respective shafts 6 and l are supported and journaled within suitable brackets 8 and 9. The bracket 8 is fixedly supported upon the frame 9 of the table and is secured thereto by suitablebolts Ill. The bracket H is adjustably secured to the frame of the table by providing a'base I2 having a slide disposedtherein into which the shank of the brackets ll slides and a lug l3 outwardly ex- 1 tends from the shank II and. the bracket and shaft assembly are adjustable relative to the base l2 by a threaded screw 14 that is threaded through the lug It. The screw M has a head :3 mounted thereupon that is journaled Within the lug l3 and the screw I4 is turned by a hand screw ll.

Pulleys l8 and I9 are mounted upon the respective shafts 6 and l and an endless sand-belt is trained above the respective pulleys l8 and I9 and the sand-belt 2D is maintained taut by the adjustment accomplished through the screw 14. The front face 21 of the backing plate is spaced apart from the rear edge of the table and the sand-belt is trained about the respective pulleys l8 and I9 and the sand-belt runs between the front face 2| of the backing plate and the back edge 3 of the table. It will be noted in Fig. II that the edges of the sand-belt run at an angle inclined to the horizontal in order that the material to be edged will not strike the belt in one spot only to thereby burn the material being edged and to prematurely destroy the endless sand-belt. The sand-belt runs so that the cutting of the belt will be downward relative to the face of the material being edged to thereby leave the top surface of the material being edged smooth and free from any splinters. The sand-belt is driven by any suitable prime mover as an electric motor 22. A pulley 23 is mounted upon the armature shaft 24 and a driven jack shaft 25 is disposed below the top of the table and is journaled within the frame of the table. A pulley 26 is mounted upon the 1 shaft 25 and a driving belt 2'! is trained about the respective pulleys 23 and 26. A pulley 28 is mounted upon the shaft 25 and a pulley 29 is also mounted upon the shaft 6 and a cross belt 30 is trained about the respective pulleys 28 and 29 so that the shaft 26 is power rotated to thereby drive the pulley l s and the sand-belt 20.

A suction;pumpj3l'is also mounted upon the armature shaft '24. A dust collecting chest 32 is placed about the sand-belt and the suction pump sheet is exposed thereto a substantial width of 3| is connected to the chest by a suction pipe 3'3 so that the dust emanating fromithe grinding.-

operation is collected by the chest and is discharged through a discharging outlet '34.

While the form of mechanism herein shown and described is admirably adapted to fulfill the 7 objects primarily stated, it is to be understood that it is not intended to confine the invention the abrading belt will be subjected to grinding seem: means for driving the belt, means for 15' maintaining the belt taut, and an inverted bend being formed in the backing plate to form a trough in the backing plate immediately below the abrading belt where the same engages the 'broad surface of the backing plate.

JOHN L. .BUCKLEY. 

